Home / 20,886.76-31,335.92-9,645.54

Finding the Fourth Proportional to 20,886.76, 31,335.92 and 9,645.54

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Solution

The fourth proportional to 20,886.76, 31,335.92 and 9,645.54 is: 14,470.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,886.76 : 31,335.92 = 9,645.54 : x
  2. Step 2: Convert to fraction form
    20,886.76/31,335.92 = 9,645.54/x
  3. Step 3: Cross multiply
    20,886.76x = 31,335.92 × 9,645.54
  4. Step 4: Simplify right side
    20,886.76x = 302,251,869.80
  5. Step 5: Solve for x
    x = 302,251,869.80/20,886.76
  6. Step 6: Final answer
    x = 14,470.98

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.